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MESSAGE FOR IKUMI

In the forum there are only ,,some,,info about accumeter VI. I want to build it because I looking to have one from more than two years...I have not enough money to buy a professional device ..Maybe for a expert people like many in this forum is not a problem...I'm just a begginer in electronics,in fact I've started now for the reason mentioned above... Ikumi does something more than a simple soldering ,I think.And if he is a japanese man(I supose )
he is very skilled ,and has a real PCB well done .Maybe he can help me with all information
I need .IKUMI if you want to give me a hand this is my email:reliance2007@libero.it
Or if you sell your device I will buy (I will make myself a gift for this Christmas)
Thanks
Alex

accu resistivity

Originally Posted by Alex

In the forum there are only ,,some,,info about accumeter VI. I want to build it because I looking to have one from more than two years...I have not enough money to buy a professional device ..Maybe for a expert people like many in this forum is not a problem...I'm just a begginer in electronics,in fact I've started now for the reason mentioned above... Ikumi does something more than a simple soldering ,I think.And if he is a japanese man(I supose )
he is very skilled ,and has a real PCB well done .Maybe he can help me with all information
I need .IKUMI if you want to give me a hand this is my email:reliance2007@libero.it
Or if you sell your device I will buy (I will make myself a gift for this Christmas)
Thanks
Alex

hi alex,

in truth, im no expert either in geophysics and electronics, but i tried my very best to build one and understand how the circuitry works......it is a big advantage before you assemble the thing....here are some material you need...for accumeter VI pattern.

ill try to post here some of my bill of materials and some pics... so that you can have a better idea.....

a piece of advice.....before you start building your resistivity project, try to understand first how it works, what are its capabilities and what are its drawback.....you might change your mind....anyway good luck........im now trying to manually log all my readings so that i can have a visual through a software....this is much better......

ill compile first all my things and post it here for others to see......i wanted to help....
g

capacitor and resistor value

hi carl,

in your previous post regarding diagram of accumeter VI, there is an equivalent circuit at the bottom....

for 24 vac, R= 130 ohms, C= 1,000mF@63VOLTS

how about for 220 vac?.....what will be the values for resistors and capacitors?......or can i remove the resistor and the capacitor from the circuit? what are the pros and cons? Need your help sir....thanks

Accumeter VI

Are you sure is 50Hz?
I don't think it is possible to work in Europe with 50 Hz because of possible interferences with the main power frequency already connected to ground point. How can we know this for sure? 50 Hz is OK for USA because main power is at 60 Hz. But if we want to use the accumeter in Europe I think we need an inverter at 60 Hz to avoid interferences and wrong mesurements. Did anybody really mesured the frequency and seen the shape of the signal?

Sorry for not getting back on this... I need to take some oscope measurements still, but basically the inverter output is a 24 volt p-p square wave. It is taken off some internal point of the power inverter.

Folks, please don't use a power inverter, and put 120vac on the probes! Very dangerous!

Also, the big cap is 1000uF @ 63v.

I'll try to make some time to finish the measurement, and post a formal schematic.

It would be 50Hz or 60Hz, as it's just an ordinary power inverter. This is not a Fluke design and cannot be compared to a Fluke. It doesn't matter whether the waveform is all-positive or bipolar, the ground doesn't know the difference.

Acumeter VI

Hello: In 2003 I build resistivity instrument similar to Accumeter, I use this capacitor, 2,500 uf 50 VDC, in the project: An underground survey meter by Harold P. he said: (Capacitor C1 bypasses the ac current and must be of a very low-leakage type.) and I use a very diferent lamp, is interesting the reaction, but now I want build a new similar instrument, I want use a digital multimeter, next here share the experiment.

Cave

Please I am requesting any information on Accumaster,Accumeter,MML,OKM cavefinder and so on. Which is better? I do not care the cost price and similar crap.(39,95 – 3995)Work or not work?Thank you, Toni.

Accumeter VI

Carl, Will you build me the equivelent to the Accumeter VI including the rods and wire TURN KEY? I will pay you of course. I am not schematic savvy at all and I am totally disabled. I have some acreage to search. So all would be appreciated.

Hi
I´m looking for a circuit to allow me to connect arc geo logger to my accumeter IV
Basically i understand this must be a circuit that can convert resistance levels from accumeter to audio levels.
If any of the members can help i wil appreciate a schematic to add to my accumeter IV
In advance many thanks
Nelson

Hi
I´m looking for a circuit to allow me to connect arc geo logger to my accumeter IV
Basically i understand this must be a circuit that can convert resistance levels from accumeter to audio levels.
If any of the members can help i wil appreciate a schematic to add to my accumeter IV
In advance many thanks
Nelson

Does anyone know how to mod accumeter to digitilice signals and plot results via software ?

Originally Posted by nelson

Hi
I´m looking for a circuit to allow me to connect arc geo logger to my accumeter IV
Basically i understand this must be a circuit that can convert resistance levels from accumeter to audio levels.
If any of the members can help i wil appreciate a schematic to add to my accumeter IV
In advance many thanks
Nelson

The Accumeter is a really poor design. If you're going to go to the trouble of adding a data logger then you should just build the design that was published in Everyday Practical Electronics several years ago: